LEACHES & WILSONS ARE THE TWO STORM PETRELS FOUND IN THIS REGION. THE LEACHES BREEDS IN THE NORTHERN HEMISPHERE IN THE NORTHERN SUMMER AND THE WILSONS BREEDS IN THE SOUTHERN HEMISPHERE IN THE SOUTHERN SUMMER.
THERE ARE SEVERAL HUNDRED PAIRS OF LEACHES THAT NEST ON MSI EACH YEAR. THEY COME ASHORE AT NIGHT TO DEEP UNDERGROUND NESTS, RARELY EVER SEEN OVER LAND IN DAYLIGHT, BUT COMMONLY SEEN OVER WATER.